CRP and rheumatoid arthritis: Given that RA is characterised by intermittent flares and fluctuations in disease activity, which could significantly impact free-living movement behaviours (and therefore reliability of accelerometer data), this study separately analysed data from two existing RA cohort studies with controlled (cohort 1) and active (cohort 2) disease, classified according to Disease Activity Score-28-C-reactive protein (DAS-28-CRP).